Best option for new bridge: a tunnel

This article on Tappan Zee Bridge risk explains one of the key provisions in the instructions to proposers, contract and design-build concept: "If the TZC team comes up with a faster or less expensive way to complete some of the work, it can ask the state for permission to make those changes and both the team and the state would share the savings."

Obviously the best alternative remains the tunnel. All over the world tunnels using engineering developed for us in 2003 are being completed for less than half the proposed cost and time for the new New York bridges.

Major benefits to the environment (air scrubbing), the traffic (extendable across the region) and transportation (rail always included).

As this project drags, it is time for TZC to use their expertise in tunnel construction to redirect this project to the useful, buildable, affordable tunnel, and their contract and the state's rules say they can do it.